/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.sms;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import lombok.RequiredArgsConstructor;
import org.hisp.dhis.sms.incoming.IncomingSms;
import org.hisp.dhis.sms.incoming.IncomingSmsService;
import org.springframework.stereotype.Component;

@RequiredArgsConstructor
@Component("org.hisp.dhis.sms.MessageQueue")
public class DatabaseSupportedInternalMemoryMessageQueue implements MessageQueue {
  private List<IncomingSms> queue = new ArrayList<>();

  private final IncomingSmsService incomingSmsService;

  // -------------------------------------------------------------------------
  // Implementation
  // -------------------------------------------------------------------------

  @Override
  public void put(IncomingSms message) {
    queue.add(message);
  }

  @Override
  public IncomingSms get() {
    if (queue != null && queue.size() > 0) {
      return queue.get(0);
    }

    return null;
  }

  @Override
  public void remove(IncomingSms message) {
    queue.remove(message);
  }

  @Override
  public void initialize() {
    Collection<IncomingSms> messages = incomingSmsService.getAllUnparsedMessages();

    if (messages != null) {
      queue.addAll(messages);
    }
  }
}
